1 . They walked to work because they couldn’t ________(付得起) a taxi.

2 . There’s no way we can________ (买得起) to buy a house at the moment. (根据汉语提示单词拼写)

3 . The obvious one is money; eating out once or twice a week may be ________ (afford) but doing this most days adds up. There could be an even________ (high) cost on your health.(所给词的适当形式填空)